Lift truck mast



FIG. 1 is a front isometric view of a lift truck mast, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the figures are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM We claim the ornamental design for a lift truck mast, as shown and described. 